bVNC单点触控分析

1. //触屏模式
   
2. SimulatedTouchpadInputHandler.onScroll {
   
3.         RemotePointer p = canvas.getPointer();
   
4.         final int action = e2.getActionMasked();
   
5.         final int meta = e2.getMetaState();
   
6.         
   
7.         // TODO: This is a workaround for Android 4.2
   
8.         //多手指检测
   
9.         boolean twoFingers = false;
   
10.         if (e1 != null)
    
11.             twoFingers = (e1.getPointerCount() > 1);
    
12.         if (e2 != null)
    
13.             twoFingers = twoFingers || (e2.getPointerCount() > 1);
    
14. 
    
15.         // onScroll called while scaling/swiping gesture is in effect. We ignore the event and pretend it was
    
16.         // consumed. This prevents the mouse pointer from flailing around while we are scaling.
    
17.         // Also, if one releases one finger slightly earlier than the other when scaling, it causes Android
    
18.         // to stick a spiteful onScroll with a MASSIVE delta here.
    
19.         // This would cause the mouse pointer to jump to another place suddenly.
    
20.         // Hence, we ignore onScroll after scaling until we lift all pointers up.
    
21.         // 多手指，滑动模式，缩放模式，缩放模式结束
    
22.         if (twoFingers||inSwiping||inScaling||scalingJustFinished)
    
23.             return true;
    
24. 
    
25.         activity.showZoomer(true);
    
26. 
    
27.         // If the gesture has just began, then don't allow a big delta to prevent
    
28.         // pointer jumps at the start of scrolling.
    
29.         if (!inScrolling) {
    
30.             inScrolling = true;
    
31.             distanceX = sign(distanceX);
    
32.             distanceY = sign(distanceY);
    
33.         } else {
    
34.             // Make distanceX/Y display density independent.
    
35.             distanceX = sensitivity * distanceX / displayDensity;
    
36.             distanceY = sensitivity * distanceY / displayDensity;
    
37.         }
    
38.         
    
39.         // Compute the absolute new mouse position on the remote site.
    
40.         int newRemoteX = (int) (p.getX() + getDelta(-distanceX));
    
41.         int newRemoteY = (int) (p.getY() + getDelta(-distanceY));
    
42.         p.processPointerEvent(newRemoteX, newRemoteY, action, meta, false, false, false, false, 0);
    
43.         canvas.panToMouse();
    
44.         return true;
    
45.     }
    
46. //SimulatedTouchpadInputHandler.onScale(IBCScaleGestureDetector) line: 1
    
47. //ScaleGestureDetector.onTouchEvent(MotionEvent) line: 258
    
48. SimulatedTouchpadInputHandler(AbstractGestureInputHandler).onTouchEvent(MotionEvent)
    
49. line: 460 {
    
50.         //多点触控手势
    
51.         scaleGestures.onTouchEvent(e);
    
52.     //单点手势
    
53.         return gestures.onTouchEvent(e);
    
54.     }
    
55. //SimulatedTouchpadInputHandler.onTouchEvent(MotionEvent) line: 1
    
56. RemoteCanvasActivity.onTouchEvent(MotionEvent) line: 1217 {
    
57.     try {
    
58.         //activity检测到TouchEvent
    
59.      return inputHandler.onTouchEvent(event);
    
60.     } catch (NullPointerException e) { }
    
61.     return false;
    
62.     }